Table 1 shows the jumper configuration for each current range. The current input range is selected by controlling the high voltage, latch-up proof ADG5209 multiplexer (via A0, A1) with low glitch and fast settling, either manually or through software depending on how the on-board jumpers are configured. The CN0560 is capable of measuring three current input range options of 10 μA, 10 mA, and 10 A. The CN0560 provides a wide bandwidth front end and converts the small differential voltage developed across the shunt resistor into a larger voltage to feed, which is then digitized. The most common current measuring technique includes a shunt resistor, an analog front end (AFE), and an analog-to-digital converter (ADC) followed by a microcontroller or field programmable gate array (FPGA). The CN0560 is highly suitable for test instruments used in automated test equipment, power supply (such as in CPU/GPU rails) monitoring, and analyzers. This solution does not only increase the number of channels per board despite solution size constraints, mitigate thermal challenges, and ease system drift calibration burden from self-heating but it also optimizes the overall precision performance. The CN0560 features high accuracy measurement of three current ranges using a combination of shunt resistors, on-board amplifiers, and a μModule ®. EVAL-CN0560-FMCZ Simplified Block Diagram Additional oversampling can be applied to trade off between noise and bandwidth to suit the specific measurement being performed.įigure 1. A 15 MSPS sample rate greatly relaxes the antialiasing filter requirements and maximizes bandwidth when digitizing fast transients and small signal levels. At the same time, the solution is small enough to be incorporated into these applications that need to be continuously monitored. Accuracy, bandwidth, and drift performance are at the same level with benchtop and rack-mount test equipment suitable for use in a production test environment. The circuit shown in Figure 1 provides a complete, wide-range current measurement system suitable for these challenging applications. ![]() Low voltage supply rails have stringent noise requirements and must be characterized under varying load conditions, temperatures, and account for bypass capacitor degradation over time. Voltage, or power profile and measure harmonics over a wider bandwidth. In addition, automatic test equipment (ATE) test solutions and power analyzers typically use multiple channels to precisely capture the current, ![]() In response to changing system demands, these circuits can transition from drawing microamps of current in an idle state to hundreds of amps under full load in a matter of microseconds. (GPUs), network interfaces, storage hardware, and a myriad of support circuitry. Systems may contain one, tens, or hundreds of central processing units (CPUs), graphical processing units Designing and optimizing power solutions for data processing, networking, portable, wearable, and other computing applications require precision, wide band, high dynamic range measurement of voltages and currents.
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